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3 years ago

A toothpick pencil and log are all the same type of wood explain which would be most dense

Chemistry

1 answer:

sineoko [7]3 years ago

6 0

A toothpick will be more dense because of its small mass

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1. The valence electrons of representative elements are

vagabundo [1.1K]

Answer:

a) located in the outermost energy level.

Explanation:

A valence electron is an electron in the outer shell associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.

Hope this helped!

3 0

2 years ago

Which statement describes a chemical property of the element magnesium?

Anna11 [10]

Well, magnesium is highly flammable, especially when it is in powder form or in strips.

3 0

3 years ago

. In an electron configuration, what does the sum of the superscripts equal?

Sati [7]

Answer:

It equals to the number of electrons in that atom, which is in turn equal to its atomic number

Explanation:

7 0

3 years ago

(2 points) Well, we might as well try a similar question. Magnesium metal reacts with hydrochloric acid to produce hydrogen gas

julia-pushkina [17]

Answer: In the given chemical equation, the substance getting oxidized is magnesium metal.

Explanation:

Oxidation reaction is defined as the chemical reaction in which an atom looses its electrons. The oxidation number of the atom gets increased during this reaction.

$X\rightarrow X^{n+}+ne^-$

The chemical equation for the reaction of magnesium and hydrochloric acid follows:

$Mg(s)+2HCl(aq.)\rightarrow MgCl_2(aq.)+H_2(g)$

The half reaction for the above equation follows:

Oxidation half reaction: $Mg(s)\rightarrow Mg^{+}(aq.)+2e^-$

Reduction half reaction: $2H^+(aq.)\rightarrow H_2(g)+2e^-$

Hence, in the given chemical equation, the substance getting oxidized is magnesium metal.

3 0

4 years ago

Which of the following is not true about chemical changes? a. They form a new substance. b. They can be reversed by physical cha

Irina18 [472]

The following that is not true about chemical changes is "They can be reversed by physical changes.", the answer is letter B. A chemical change can form a new substance, can be detected by the change in color and they have properties different from their starting materials.

7 0

3 years ago